Photographer: Filipe Correia — The photo above shows a partial 22 degree solar halo and its reflection as observed at Pego Do Altar, Portugal. In order for halos to form most of the hexagonal ice crystals that compose the cirrostratus clouds seen in this sky must be similarly oriented. Sunlight enters one of the columnar-shaped crystal’s side faces and exits at a 22 degree angle through an alternate face. Make sure to always protect your eyes when looking toward the Sun. Photo taken in April 2013.
